Products VentilatorRound Vent Back Ventilator 197-00883-00 Item Number :197-00883-00 *S.S. 5 “ Butterfly vent grills. *Made of S.S. 304. You May Also Be Interested In Butterfly Vent 956-03703-00 Ventilator 197-00883-00 Eye Plate 956-03633-00 Anchor Chain Connection 956-00136-00